.Effect of precursor molar ratio of [S2?]/[Zn2+] on the lifetime of ZnS nanocrystals[J].Optoelectronics Letters,2010,6(3):161-163 Effect of precursor molar ratio of [S2?]/[Zn2+] on the lifetime of ZnS nanocrystals 黄青松 Institute;Material;Physics;Tianjin;Laboratory;Optoelectronic;Materials;Devices;Display;Photoelectric;Ministry;Education;Engineering;Research;Center;Communication;Technology;University; Abstract:       Undoped ZnS nanocrystals(NCs) with different precursor molar ratios of [S2-]/[Zn2+] are prepared by the chemical precipitation method.The structural and optical properties of the samples are characterized by the X-ray diffraction(XRD) spectra,photoluminescence(PL) spectra and PL decay spectra.The XRD analysis shows that the crystal quality of ZnS NCs becomes better and the grain size is larger at higher [S2-]/[Zn2+] ratios.The PL peaked at 430 nm decreases with the [S2-]/[Zn2+] ratio increasing,which is asc... Hits: 4463 Download times: 221 View Full Text    Download reader